Passive skills have had a long and storied history. When Diablo III debuted at the WWI 2008, skill trees included passive skills, much like in Diablo II. In 2010, it was announced that passive skills had been renamed traits and separated out from active skills. At the July 2011 Press Event, Blizzard announced that passive skills were once again in the game, replacing the traits system.

Numbing Traps was not seen until it showed up during the Diablo III beta as a level 21 passive. It became a level 23 passive in Beta Patch 13, and when passives were reorganized for Beta Patch 14, Numbing Traps was moved up to level 30.